#include <REGX52.H>

void Delay1ms(unsigned int xms)		//@11.0592MHz
{
	unsigned char i, j;

	while(xms)
	{
		xms=xms-1;
		i = 2;
	j = 199;
	do
	{
		while (--j);
	} while (--i);
	}	
}

void main()
{	
	while(1)
	{
		P2=0xfe;//1111 1110
		Delay1ms(100);
		P2=0xfd;//1111 1101
		Delay1ms(100);
		P2=0xfb;//1111 1011
		Delay1ms(100);
		P2=0xf7;//1111 0111
		Delay1ms(100);
		P2=0xef;//1110 1111
		Delay1ms(100);
		P2=0xdf;//1101 1111
		Delay1ms(100);
		P2=0xbf;//1011 1111
		Delay1ms(100);
		P2=0x7f;//0111 1111
		Delay1ms(100);
		
	}
	

}